期刊
SCIENTIFIC REPORTS
卷 11, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41598-021-92709-8
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资金
- National Research Foundation (NRF) of Korea - Korean government [2019R1A2C2090648, 2019M3E4A1080227, 2016K1A4A3914691]
- Institute for Basic Science (IBS) [IBS-R014-D1]
- National Research Foundation of Korea [2019M3E4A1080227, 2016K1A4A3914691, 2019R1A2C2090648] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study indicates that 2H-Pd0.08TaSe2 is a nodeless, multiband superconductor, with distinct characteristics under different temperatures and magnetic fields.
In order to understand the superconducting gap nature of a 2H-Pd0.08TaSe2 single crystal with Tc=3.13K, in-plane thermal conductivity kappa, in-plane London penetration depth lambda L, and the upper critical fields Hc2 have been investigated. At zero magnetic field, it is found that no residual linear term kappa 0/T exists and lambda L follows a power-law Tn (T: temperature) with n = 2.66 at T <= Tc, supporting nodeless superconductivity. Moreover, the magnetic-field dependence of kappa 0/T clearly shows a shoulder-like feature at a low field region. The temperature dependent Hc2 curves for both in-plane and out-of-plane field directions exhibit clear upward curvatures near Tc, consistent with the shape predicted by the two-band theory and the anisotropy ratio between the Hc2(T) curves exhibits strong temperature-dependence. All these results coherently suggest that 2H-Pd0.08TaSe2 is a nodeless, multiband superconductor.
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